Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1121775407d79cb32d736cc95d78b05a31400041ff77000e083cf06c30c499b' 
  AND token = 'imoYAlvWEV5rSS/7ZR7qVMO0g40+6PKPKIYCeZQFJLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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