Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e77f5c74cc9414c49e9b1fab5c023e96de6afa748f95bb3a485c5d1615b2cd8' 
  AND token = 'JpxETbqoC7VbyLTC4e0ANcl9oyF+CbohdhW63EcV5KQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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