Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b460cdc5476e0ed4813330123d40078ac155884c1c8f56daa9ffe3cb28afcd68' 
  AND token = '3mns8jjQ589pfb4vabj9QZ61EcqFK10Gn9JxRjb3HjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00445

JSON explain

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