Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bac8300071dac4e82918db8c7c10d0c1eba61e60bebb3d8cdfe1e092a41c304a' 
  AND token = 'hckjI5qLdI2orR+FSRJ/zkOHdHlWtY156ScKzxwkwgI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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