Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3835975147141c2659dc446d4a7cbe7157d01a699ce3ca03c705e4f25a405422' 
  AND token = 'IfEqhFez4n/7MELb5a0wPL4punikTJaao82xujt4NsM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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