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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ffda05bc06274948b93f41864fa271bd3c4202b9bcb73d43d0c7ce1912bc33f' 
  AND token = 'FFy/v0OmPn8sBv0dq2L2EgUZIGs8eN/9sDR9firdNOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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