Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66d22c4dab97e68e1b507eb43959fef16789f5061c160b3ae91ce6c4b009303e' 
  AND token = '15u2Hx2Hm+ShtUkSAJkf+1Ge2aTAgTlorg/PVpw1TW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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