Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec5794c259a7a10223d4f51059be9a5964f8413185f782e7a701511fd9f30e6e' 
  AND token = 'TGncnlz7BFBqk2cGxSlpDyQoeU2m3v/dzl0OvD1G0TA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}