Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '10b79b8e7a2d72beeeb487fead0b320c86c8a18b83000a9987c0f7bb6d0a596e' 
  AND token = 'BC02lXaBcyIl++U7DRD3PoYaZOF51VFVEpiWrZPLMQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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