Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8da76dd90cbeb6eb2f9c31029c5b10d455bbebb2c4bea644a03dfc6016301a63' 
  AND token = 'fy360H0dFBQbUKs1dXC+VPo+/D9nHXS+EQeXAJ/iY5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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