Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b4fb52de56c90841f2c270676a03a7eb803b54ad52a6ce5e36da9f399986598' 
  AND token = '+tIqD1bfHXiiEYa4u241+9j3ubwfmTX7Neo4JGe5IIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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