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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e5d1f729604ebd97228142993421e97a2dbde6750ff60551a72b1d0a1a020e7' 
  AND token = 'TZ254ocvwbX9Is8+fB1zLh/mmDBmy7Bi6qJH3VRQR1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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