Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abe48d2cd20f3d17a9ea9e240778f2b89125e3c515a10989b2f25c0fa3199abb' 
  AND token = 'gHzn8d21Nl5eIdW5JAPUhgpRWzZh+5RLaqqQSd4qbpw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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