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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd14e6c515114fb9d299942fd3e0503a5cbaaf16595efcdae8aa68ee16aa76cef' 
  AND token = '+l2rgCxrMxS7cMptACapLj0voFjRwtkJ7z3wdCbAJXg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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