Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ff0351622e5ce41e0692abf0916d13ee802d6c912185348ca354ce073331217' 
  AND token = '1VZq1x06xZQm0W2fawUCuFvvKBupUpoBGNyWIaIdQOs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00103

JSON explain

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