Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70a4f9e5ff45928b9d909744fd092336acb7f8e608de2a1f70142defbe2eff01' 
  AND token = 's/ky5B7OgrXysRJtPZmWkw5+U/YGSQNrGGnFE28tZ1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}