Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7861babf66f9739ce6e53ef14e09c80c0f535fa3bc2efb4772af277b4e827ae' 
  AND token = 'Uj00zYy4o9/PjA/0t5Ht50+8LrLmrgZDy2ZyfefkRn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00079

JSON explain

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