Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5795645d449d6a87749ad41c6305d8fc9259ee9ba91547f5d7c4297b3d7e8882' 
  AND token = 'MUEMtitGar68og9QaljCco47asZfWHUrqGyu+YzGGIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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