Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c58a3f085c6dcfd8475ce046e46f700e74c8089aecdf131fddd173d665922f6' 
  AND token = 'CxAUsz2jwoxi7m2XiPryHqtsSkzpv/0YU5ajbrUhYV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}