Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbea22b195497357c4261f51d6198e8ee79c41d7a0c5d7885f4d786b4c572c98' 
  AND token = 'buclNOGPRJIt+SCGY/OYMAoYWKV85foIcJxTdLHGBT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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