Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95c3fe42afbc8cdd525c8b04c60d7501241218b445eba463e86c842a50a7d282' 
  AND token = 'gkgY+ryd33XmdhWD1e56U5ghdbjhHVbosVrYSGjoszE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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