Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c78dd4c25fab733fad63660da5764c9a20a8f3949627cd61c94e82043d22284b' 
  AND token = 'JeOFKo9WGysTThe/ZMVFbklWpEdXDfsaaSWQmLCaGHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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