Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2cf4677e46da68420b268826b92d82da41cb0c10775c46149037e104a8a307e' 
  AND token = 'H3W5Z11cBzgVvZssA5VaGU6Lgxq8o47YvwLmltupTvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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