Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38988ef80360084c53acc2eb47956d25fcd68c29cbb41ef8057da409a678cb6e' 
  AND token = 'G/s9x6HGQNPHxrEwH4eJiYIkEZQTaIxktB5l6QgnGbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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