Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e1e88dc712f1da3bd76fcdf37c9b418ac9680037550bbe5230d4f14dfaa1e53b' 
  AND token = 'lG6LQnpUbExAGIL7/fAUIclrOdNNeQM2v7ERpiyvY9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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