Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '219ecfe3240034fc67ae052e1c99f785738e0c8a3ff2e8d63768c360af83ee30' 
  AND token = 'EyAADmkXlou//Qt/f4SMyCFE11dWT7SdPASWpmhKfxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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