Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dea2457d086f68793dfdc008599338e0f689f0e2157bb02aeae02bd5b7a09542' 
  AND token = 'MEYdhwDedV8O89afiEDWVXXBhwhejqOEoP7lmaepJOM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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