Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a725ec570170b1dfe445129dc7c2e550ecaadc0f76d6f67115e2515f6634f3f4' 
  AND token = 'jyj4Id70k+Lm/ZB9gEeJK4TWB7TycQWzTgKGjpCvHs0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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