SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd3363120e4299a98d0cae5ffe3bc7fa8dcdd7034653c17794525a58fcca1527' 
  AND token = 'KVl8B9j/Nwew1BsDULos5SIVvo3hpHXrg6lQmHaUZwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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