Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '67d85aab057f09bd0f384ed064bfe80b6f3042486f69a00651c7ffa318721d5d' 
  AND token = 'JnelPAOuexllOD/Had40SJsMLNj7CqD4/GuJQH4NrKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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