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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3d6bccac09b48e577180b2d14af659c22b5a082ed0fb55d06b29de4b1eb585d6' 
  AND token = 'VJRByEXkd6iCoL7ptC01ndkeeRqgd9jJR4mj6PVfRY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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