Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74c703954f74b59cfcd74b21cea7f039ade5e7808627106098c38bdb356f53d5' 
  AND token = '0SEvV61v2MQ/stv4iGGdLXy4DbHmCkCEXtQ8JdvGnG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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