SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8bbc4e3ffd81e10b35ea2143c21d752d419b221938d694f92ab7e93c655fb4b' 
  AND token = 'BMPPg/whfUEmizxQaTF95sMJ4KeESGX1BVgrVMG4Opc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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