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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1044a5a6f854e96d0ebfb9e1b44909fde677ff0d9e22a6b2dbb036247eb51ee' 
  AND token = 'VIeF/rt/z3kTxZFjI3b8mkfV80IkW582HyMrdOW1OzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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