Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71fd7d0c810ad0259d245a6d3d2e0fe453dd11f3e4b6bd7855854c5ca6c517cd' 
  AND token = 'BPC0EoP/S/W6fNOAILSMGoy9CQAbApSjLxbw//j8Los=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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