Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '809c175e944e60bd37d6dcfaf9a3b75627927bf435d9289d46ac0e84db131d97' 
  AND token = 'NsbXmWOzA8LF0DaCFgoSWfsJN7N/B+uBkQyPHD6UZ6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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