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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07ada403861519c5b30c9ce4e3aeaf83080543670601e4910d2f3aa9827967b3' 
  AND token = 'CusICTRxh5Q3o2v6vGU0CTp94YKPhWcLPUfHsr52q5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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