Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67b37990bcf3f81b030d69b29fe87ee29a1bb4a884b0426e285bee08ea0c3fcd' 
  AND token = 'aaHgb46WZLH/ERxRZCTBEjNFpWk6YS6g4f/bJnyTUJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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