Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3470a33f60e80ffd9ba72da052d39be74eed9dd743ad0af88f1288bb505f9e87' 
  AND token = '1eMMchPGMexD1h0guKbCVwvSDd1M62r6+m+evbGbNNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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