SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '225d85eab754f81fd958bd47362b47cdf39d222f55aa783e3314e5ef6e31d2de' 
  AND token = 'zhsFijU6OhAkxvLxjG/u1OpSBgKTV8kd+QcEpY3RetA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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