Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44c30986dcbaa0d27c2220f7fe8bfd8e40b6a244970888d7ac9a2cf34c901bf2' 
  AND token = 'N3h0zJrrlaHT+6KjVB0ycAEJ7BPRSr/SibV87znZfOM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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