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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f79e2e2f26fa463b078ab90c62a78ed416fcc100aed16fc8c6e96cae4d9a785' 
  AND token = 'RbbZ6bWwAX9MK6C3KIoXHqJlUqsjSVrRD6kdPPsKZ70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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