Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e96cab896a6ea2f16da360046da7019182b9b441969aa03009697170e41026d8' 
  AND token = 'RHbmgYu+GvimOSQfmc1N+i/NW2mkA7sJULcQIUJF0Sc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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