Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b676c03e5f3443f18815050e1c3a2e335ca8fa2660159bd3888d4545abac859' 
  AND token = '0ucw97gL9UH+2tkOIENo333a5izI2+PR9yrvTEopHHE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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