Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad72c5c9e9e18096c746154af4fa3e325c295775ae8ee43c685aac111775f00d' 
  AND token = 'V7XY5iOs+3Hvxruh3kd6vP1cDRwecDfXComWIoeLvr4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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