Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fffb646a189c14e5b8577b6453db895b17c1c9c8ee30668c3cd3afb60253a15b' 
  AND token = '9L0dOGhX2tHMM81lU+dUJKk+vseIRGCpt/739S5B0gk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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