Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2ae82cf13ae53a9413c55339e59b2b5e27d39813a965f3ba228f8cfb3df4835' 
  AND token = 'ttiPptyaqiSaR8/3k9TIYgcQQ9Ua2P3ZZ4+QVm/AJCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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