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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ddd560d36f605feb4a1a1b50c067cfc2cb531d91f45eeaea0adb64f229352c35' 
  AND token = 'yWNX9cP9xEsFA5X8Zbmu6nP4xhIsVJjhu0AhISZjRwg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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