SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c07a9b4b13cf86bb688bfe905023a165b19fea56999ac6d0bd31486e77b68929' 
  AND token = 'UAhYPizaOivJY11woL+NfXSzMJyQwjUtdMPd132KBGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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