Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8751b71a642c7464a090f250482b7a017a40880318d22561e0b15df55064c04e' 
  AND token = 'j9nuhtRTfiSuPdFR50DC07KONj2pUJjP6ctIHHnip7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00075

JSON explain

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