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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83edd33dc9a8677c49ce18b1aab19cfacdd9408be7d2eabee6bf2e9dab0680d2' 
  AND token = 'sDRsyVEpMbkz6L2eWhhCW2sPyp/Bfud7o8Jnu484Ops=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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