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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '319762f2327c1a5f90e6b3864a86376efc000bbf8063d961656b5dd5c2020aca' 
  AND token = 'Ez3ifcsKEJISDdHXRfQbKtttsHy1UZd/iLW1Ir7ZH4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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