Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31c7f2192eb9dd2dea577556e10ff5e7c5bb9914feec25f7d4f488c3ac39bc53' 
  AND token = 'm629L+l9JwS5z6FB57JogfHIqq95CDKLzn0pmDvLPQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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