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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a24ba20f094c7fc5e8a8441f7553dc04c20052cbd2141f629cde7fed2a110731' 
  AND token = 'XwV47AJvZ7Mw0J4tsXLjl9TwnHMXExEJLAZU27LeAb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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