SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '93b02579de69a91633666033bdd731319ebe5c5e219714cbe92fecc883f43e6b' 
  AND token = 'KO+wOme/pbpSkGI8sXWLMBrCGeLlB+iVvra/TUz+xLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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