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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd44d6b3d1e698ecb4e61212878de5a3a161da79679dae6d8a393686d024deb6e' 
  AND token = 'vYqJI2cbOLr739GtER0CcSr5MmZHUwRWO+t/9lc0p+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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