Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '066c6d0e0b6fdd4592ea45160c0e5bddd1b829acaf5ecb5477250de66eaf7c7a' 
  AND token = 'A7G+BukZvygDqH7GOf+b5kHLhkV5udwMeik0E+Y6m6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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