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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28499827ad71b95e33cb4fd26a8acd7ee8b1a2a32ad299ebcf06dea5f3832f27' 
  AND token = 'T11Mr+AgfCUWZUR01KNAHwRn8KrYeLP44R+n3zgH6ws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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