SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23ca9a66c49e3d815667d2be8a3589175c89e4cc24599f1bbd566e7e85853cde' 
  AND token = 'P6FBzGo1p1Gm/xu0DTqBaH2BYJCf34qPzQwL++czF8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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