SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bc4f3019b7f6fc2bf891754db53871569fb1d75e8c7e7976b532c909cb2b921e' 
  AND token = 'LpLGBzpo7mj50C6T/TYfaWy5JyLGbVgU5H3DgIi76J8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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