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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e96ef3c30e78e0fac93c3e19684a015b2c033b7de0dea1ddcc24919c76463e8' 
  AND token = 'dtULKTkpnWB+OHyLDQDhKcG8e9NhkTS/oKkjDEDsyJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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