SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '094487bbf300be70f8ce696e53de25c4340624f67e331932b067be12744a0426' 
  AND token = 'VBF65NgyXSJSphz4U7o5nJHYGCKcwuIcqR2xsSNr/cY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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