Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '035351438dfb809329f15863a22a4ae6ba0389d668db72d9e8bb2d87e13ccf7a' 
  AND token = '4Y7ONbpyUt1I9isDSk5IOJmF+aV+4yv9BDYmw18pmfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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