Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ef82fce8b43fc2b11e2292e76b3e1e6266f0c1191ae2fc22307c51bbd0b67be' 
  AND token = 'IJI1++JQJnQNEx+0dOsEM9HBkNy5fh8mBMUMBHjU1VA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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