Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '673de19bf3b1825f69052a91139b1d9a1389d2fbb02a06acb0ac1aa50228aeeb' 
  AND token = '+3nGwjzgk843RSf1pK0dQTaTxE7rynoetmCOZqcgRR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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