Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8936fb62b5dbc833956fbeeaa12e40ff2e990330fac223fe20b37b5da9e62ee' 
  AND token = 'S9vJUtYmpBCUw/N/wnVpIL9uyhWg4N7MQXCC3versrg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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