Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd4fb60fbc052b785fd098e15c3507e1864706aad4e03772c3571dfcbc892cc3' 
  AND token = 'CNq44rtFazxfYcs7j/J8pg2C30KPHDTM5iXe8LXv/O0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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