Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd029ba964df28df87d1c538a4b0e113800b686b4a46387c168a367fbe500eff7' 
  AND token = '/c+Egh6di4pfM/knNZVQrHMZyORTF7NfF1bsnt4aYTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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