Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c9b10ba6778c00ec13373ecb6f853131bf23f5679a4fe5538913c61558e63a8' 
  AND token = '4vAILuMuf1iu1xCWVWBAc2N2+PmHBB5h9DR6oZ+jvqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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