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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96b36c7c3304d9a9e06eb34c3a58d6cc0a2a401297704a6d4b5383bd4a7cfa96' 
  AND token = '7NHnyp2nIepRKTbjfVr/2OtzlTpYa0ogkQhARnJfaOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}