Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c551a58ca4ff3243ae6764696046543089c46bdd7351b1856e2f1396f2add61' 
  AND token = 'Nd0JjXNewE5m6AeWDVpcpgmgrFHR1cw9XRE1Ly6YR1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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