Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c62a6759fc9c871bc91173bbfb0338bb424f6f5874c811023feb286a0bb06137' 
  AND token = 'y0HIokpbhSAPxwQ9WJP2WGsZk986LlIaBr0sN3DLBAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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