Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac756ea7d02f9133836259fe16474af510d000c1ab4d199231220a69ba9b57e4' 
  AND token = '3NvncKhRXki0o0pVzD5d9DTCrfvQch/z1t9bMqf/6Yg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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