Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0aa44346ce13cbe17e4c863bad7688f5140851e2c89a479bddd3948462f2b47' 
  AND token = 'vfm597utokvgJgRODsd0htDuPnm6DI00cpvAmYiSQOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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